Tunneling-machine.



W. F. WITTICH.

TUNNELING MACHINE.

APPLICATION FILED IULYS, 1911. 151591,86@ y I rammed July 18, 1916.

l4 SHEETS--SHEET l.

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W. F. WITTICH.

TUNNELING MACHINE.

APPLICATION FILED JULYS, 191i. 1,191,864.

4 SHEETS-SHEET 2.

Finck 2.

"atented July 15, 1911s.

W. F. WITTICH.

TUNNELING MACHINE.

APPLICATION FlLED1ULY3,l9|1. l ,l 9 l ,864. Patented July 18, 1916.

4 SHEETS-SHEETV 3.

W. F WITTICH.

TUNNELING MACHINE.

'APPLICATION FILED 1ULY3, 1911. 1,191,864. Patented Ju1y18,1916.

. 4 SHEETS-SHEET 4.

WILLIAM r. w1TTIcH,.oF Emn'rENNsYLvANIA. 4

TUNNELING-MACHINE.

To all whom it may concern? Be it known hat I, WILLIAM F. WIT'rIcH,

a 'citizen of the vUnited States, residing at Erie, in the county of Erie and State'of Pennsylvania, have invente new and luseful .Improvements in Tunneling-Machines,

. of which the following is a. specification..

' '.Ihis invention relates to t 1,Jnnelingmachines, and consists in certaln lmprovements in the construction thereof as will be herein'-l after fully described and pointed out in the claims. 1

More particularly, my invention relates to the form of'head and manner of operating'` the head of a tunneling machine. The invention is illustra-,ted in the accom. panying drawings as follows:

'Figure 1 shows a central sectionthrough v n the machine indicating the mounting of the head and the manner of driving the same. Fig. 2 a face view of the head. Fig. 3 a side elevation of the head, thev same being partly in section. Fig. `4 an enlarged viewl of one 'of the cutting heads. Fig.' 5 'a plan view, partly in section, of one type of cutter.

Fig. 6 a side elevation of the same. Fig. 7 la plan view, partly in sectionl of a second type of cutter.4 Fig. 8 a side elevation of the same.

1 marks the frame.

This may of` anyv f desirable shape. 2 marks the bearing frame carried by the frame 1, 3 a'motor frame carried by thev frame 1. The field 4, 'armature 5 and commutator 6 are shown in outline. The arma# ture shaft 7 is carried by the bearings 8 in the frame 4.

The power is carried from the electric mo'- tor by the following mechanism: The. gear 9 is fixed on the shaft 7, and meshes a gear 10. The gear 10 is fixed on a shaft 11 which is journaled in the bearing 12 in the bearing frame 2. The shaftll drives the shaft 13 Y through the clutch 14. A gear 16 is fixed on the shaft 13. The gear 16 drivesa gear 17 journaled on the shaft 18. The shaft 18 -is carried by bearings 19 in the bearing frame.' Y The main head 20 is xed on the shaft 18. This head is driven from the gear 17 by the following mechanism: The gear 21'is fixed on the shaft 18; This meshes a gear 22. The gear 22 is fixed on the shaft 23. VThe shaft 23 is carried in the bearings in the Specification of Letters Patent.

v.Application led J'uly, 1911. Serial No. 636,704.

' side of the gear 17 (see Fig. 3). It will be noted that as 'the gear 17 is-ro- Patented July 18, 1916.

bearing frame 2. A gear 24 is fixed on the 1 shaft 23 and meshes a gear 17.

v. In thls machine, the main head 20 is'rotated slowlyv and there is mounted on this mam head a series of rotating cutter bearing heads operate directly.` upon the Y.

face.

. The mai'n head ilprovided with the arms., 25 whleh are .joined by the rim 26. Cutter heads 27, 28, 29,30, 31,32, 33 and 34 are mounted on the varms'ofl the main head.

They are carried by the shafts 35 which are arranged in bearings *in the arms ofl ,the vmain head. Gears 36 are fixed on the shafts 35, andthe gears 36 mesh gears 37 onthe shafts 38. The shafts 38 extend radially back of the arms and are mounted in bear-v ings on the main-head. Gears 39 arefixed y on the shafts 38, and mesh a gear40 on'the tated,'the cutter bearing heads through the v gearing just described are rotated relatively to themain head 20.

Each of the cutter heads has a cross frame 41 with upwardly extending ears42 and la shaft 43 between the ears 42. Arranged on the shafts 43 are the cutters. These are of two types as shown in Figs. 5, 6, 7 and 8', l

- and it will be noted that the cutter` heads 27- and 28 are similar and occupysymmetrica-l positions on the head and this is also true of 29 and 30, 31 and 32, 33 andA 34 respectively. One of each pair of cutter bearing headsxis provided with the other type of cutter.

v In order that the cuttersn the Cuttr'ff preferably provided with one type of cutter, 'y andv its companion cutter bearingl head 1s",l

bearing heads may all be operating Aupon rthetunnel or tunnel face of the bore, Igpre- 'for to tilt the cutterfbearing heads slightly with relation to the facefof the mainheadf the rear considered in relation to the direcdeeper cut to the face thanthe forward side so that the side of each cutter. headto'wardv `tion of travel of the head will present La:

of the cutter bearingvhead.` In this way, a .1

shoulder-along the face of the -he'ad is prel vented and all the cutters of the head are brought into action as the main head is rotated.l The immediate4 face occupied by a cutter bearing head -is slightly7 on the slant to the generalfplane of the ace'as clearly shown in Fig. 4. lIn this figure the cutter ihead 32 is shown as occupying the position .I 32 is at a slight angle. The-amount of the angle can be observed by the fact that. the line indicating the tunnel face at the top and bottom of the figure is perpendicular to the axis of the main Shaft 18 and the4 tunnel face directly under the' cutters is at anl angle to this.

The head shown in Fig. 4 is the cutter bearing head 32 and as shown is occupying a position on the face similar to the cutter bearing head'33 in Fig. 2. rlhe details of the construction shown in Fig. 4 are as follows Cutters 44 are mounted on the'shaft 43. rlhe shaft 43 is carried by the ears 42 mountedon the head 32. Arranged on the head 32 there are also brackets 45 having the ears 46. Shafts 47 are arranged in these ears, the shafts being arranged-at an angle to the axis of the'shaft 18, the path of the shafts 47 nearestthe head being the larger. In this way the surface made by the cut of the cutters 48 is conical with the smaller end ofthe cone frustum in the direction 0f the bore. Cutters 48 are arranged on theshaft 47. rlhe purpose of these cutters is to break down the wall along the corner of the face of the tunnel. Studs 49 (see Fig. 2) are also arranged on the cutter bearing head. These studs are parallelwith the axis of the head and cutters 50 are'arranged on these studs.

These are to supplement the cutters 48 on the circumferential walls ofthe tunnel. The cutters shown in Fig. 8 comprise a collar or hub 51 on which are arranged the teeth 52. The teeth 52 have the points 53 which are beveled olf leaving a point 54 nearer the center of the cutter. The cutter rotates by traction as the cutter head is rotated and the points 53 coming in contact with the face, cut the face and as the rotation progresses, the tooth is fulcrumed on the point 54, and a sllght -portion of the face is broken out. This feature in a broad way is shown and clalmed 1n a former application #s 537,146, filed Jan. 10, 1910. The head hub 51has the friction collar 51a between it and the shaft 27. i

rlhe cutter Vhaving the hub 51 tends to make radial ribs in the face. In'order to break these down, I provide the cutters 55 ,which have a continuous periphery. They are mounted on the shafts 27 with an'interposed collar 57.

I`What l( claim as new is:

1. In a .tunneling machine, the combination of a main head; means for rotating the main head; a tool carrying head rotatively mounted on the main head with its axis in the same general direction as the main head;

rotary tools relatively mounted on the tool carrying head, the axes of the tools being noncoincident with the axis of the tool carrying head; and means for rotating the tool carrying head relatively to the main head.

2. lin a tunneling machine, thecombination of a main head; means for rotating the main head; a tool carrying head rotatively mounted on the main head with its axis in the same general direction as the main head; rotary tools relatively mounted on the tool carrying head with their axes radial to the axis of the tool carrying head; and means for rotating the tool carrying head relatively to the main head.

3.' In a tunneling machine, the combination of a main head; means for rotating the main head; a tool carrying head rotatively mounted on the main head with .its axis in the same general direction as the main head; rotary tools rotatively mounted on the tool carrying head and provided with a series of radially extending cutting points, the axes of the tools being noncoincident with the Aaxis of the tool carrying head; and means for rotating the tool .carrying head relatively to the main head.

4. lin a tunneling machine, the combination of a main head; means for rotating the main head; a tool carrying head rotatively mounted on the main head with its axis in the same general direction as the main head; rotary tools rotatively mounted on the tool carrying headu and provided with a series of radially extending cutting points, said tools beingarranged to operate by traction and the cutting points having a .beveled surface extending therefrom in a position to be brought into contact with the face after the contacting of the cutting points, the axes of the tools being noncoincident with the axis of the tool carrying head; and means for rotating the tool carrying head relatively to the main head.

5. lln a tunneling machine, the combination of a main head; a plurality of tool carrying heads rotatively mounted on the main head with their axes in the same general direction as the axis of the main head; tools rotatively mounted von said tool carrying heads, said tools having varying cutting faces coincident with the axis of the tool carrying head; and means for rotating the tool carrying heads relatively to the main head.

6. .Ina tunneling machine, the combination `of a main head; a plurality of tool ill@ carrying heads rotatively mounted on the main head with'their axes in the same general directionas the'axis of themain head; rotative tools rotatively mounted onthe tool carrying heads with their axes radial to the axes of the tool carrying heads, said tools having varying cutting faces for oper- 15 l rying head relatively to the main head.

ating over the same surface ofthe tunnel face; and means for rotating the tool carrying heads relatively to the main head.

7. In a tunneling machine, the combination of a main head; lmeans for rotating they main head; a tool carrying headrotatively mounted on the main head With its aXis in the same general direction as the main head lbut tilted theretoto present a slanting face toward the Work to make a deeper cut at the rear of the tool carrying head; rotative tools mounted on the tool carrying head on the face thereof, the axes of the tools being noncoincident with the aXis of the tool-` carrying head; and means for rotating the tool car- 8. In a tunneling machine, the combination of a main head; means for rotating the carrying head; and means for rotating the. tool carrying head relatively to the main head.

In testimony whereof I have hereunto set my hand in the presence of tWo subscribing Witnesses.

WILLIAM F. WITTICH. Witnesses:

B. M. HARTMAN, VINNIE C. HEss. 

